Use the information you learned about carbon-based molecules to explain a human's need to participate in the biogeochemical cycles.

Human releases carbon dioxide during respiration and also certain activities performed by him  lead to generation of carbon which at some stage become the part of biogeochemical cycle.

Explanation:

Carbon is an elementary part of all living beings and thus is found in almost all the living organism and human as an evolved species has the ability to take in oxygen and release carbon dioxide.  

This released carbon dioxide enters into the biogeochemical cycles (predominantly the carbon cycle) and get converted into useful form again after going through a cyclical process via various biotic and abiotic stages.  

Also certain human activities like burning of fossil fuels, wood etc also releases carbon based product such as carbon di-oxide, carbon mono-oxide etc, . These products from unnatural process also become part of biogeochemical cycle.  

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.